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5-7
Performance Tests
Test 4. Optical Input Return Loss
and Regulatory Information”.
Procedure Option 022 instruments (angled contacting connectors)
1 Turn the source module’s output off.
2 Connect a single-mode patchcord between the source module’s optical
output and the return loss module’s INPUT SOURCE connector.
3 Set the return loss module’s wavelength to 1550 nm, and select an
average time of 1 second.
4 Locate an HMS-10/HRL to FC/APC (angled FC) patchcord. Connect the
HMS- 10/HRL end of the patchcord to the return loss module’s OUTPUT
connector. Terminate the FC/APC end of the cable.
5 Zero the return loss module.
6 Turn on the source module.
7 Remove the termination from the cable, and connect the FC/APC end
of an FC/APC to FC/PC cable to the free end of this cable. Leave the
cable’s free end uncovered.
8 The return loss module measures the reflection reference (14.6 dB
return loss of the patchcord’s FC/PC connector in air).
9 Disconnect the FC/APC to FC/PC cable.
10 Make a low- reflection termination in the HMS-10/HRL to FC/APC
patchcord. Do this by wrapping the cable 6 times around a 5 mm
diameter mandrel.
11 The return loss module measures the termination parameter.
12 Connect the HMS- 10/HRL to FC/APC patchcord to the Agilent 86120C’s
front panel OPTICAL INPUT connector.
13 The lightwave multimeter measures the return loss. Compare this
measurement with the specification listed in Chapter 6, “Specifications
and Regulatory Information”.